<p [(appHelloWorld)]="mes">{{ mes }}</p>
<!-- <ng-template [appShowList]="['apple', 'pear', 'banana']" let-fruit>
  <p>{{ fruit }}</p>
</ng-template> -->
<!-- <p *appShowList="['apple', 'pear', 'banana'];let fruit">{{ fruit }}</p> -->
<p *appMyFor="let fruit of ['apple', 'pear', 'banana']; let i = index">
  序号{{ i }}: {{ fruit }}
</p>
